From Adobe:
Adobe Photoshop Lightroom 4.4
April 2, 2013
The Adobe Photoshop Lightroom 4.4 update includes these enhancements:
Download the Adobe Photoshop Lightroom 4.4 Update: Windows | Macintosh
DNG Converter 7.4
April 2, 2013
This version of the DNG Converter supports over 20 new cameras including the Canon EOS-1D C, Nikon Coolpix A, and Samsung NX300. Visit the Camera Raw page for a complete list of supported cameras.
Download the Adobe DNG Converter 7.4 Update: Windows | Macintosh
B&H carries Adobe Photoshop Lightroom.